How are Folsäure and Sport related?

The relationship between folate (vitamin B9) and sports performance is not strongly established, and the provided context does not contain direct evidence on this topic. Folate is crucial for DNA synthesis, red blood cell production, and homocysteine metabolism. Athletes may have increased requirements due to higher cell turnover and oxidative stress. Some observational studies suggest that adequate folate status supports oxygen transport and recovery, but randomized controlled trials showing performance enhancement from supplementation in well-nourished athletes are lacking. The context discusses DNA variants like FTO and BDNF, which have small effects on metabolism and weight, but no direct link to folate. Therefore, the evidence is unclear. A balanced diet rich in folate (leafy greens, legumes) is recommended for all athletes. Supplementation should only be considered if a deficiency is confirmed, as excess folic acid may mask B12 deficiency. Overall, folate is important for general health but not a proven ergogenic aid.